1. An insult directed at an idiot who is generally annoying and is always full of shit, e.g stuffed like a duck.
2. A person who eats chips all the time, but then has no room for actual meals.
"ugh! Stop being such a stuffed duck, man!"
"God you eat like a stuffed duck!"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.